Key result
Pediatric vasovagal syncope is linked to ~62% higher baseline SDNN, reflecting increased vagal tone.
Why the study?
This study aimed to evaluate autonomic imbalance in children with vasovagal syncope by comparing baseline heart rate variability to healthy children.
Does baseline heart rate variability differ between children with vasovagal syncope and healthy children?
Case-Control (n=43)
Yes
Does baseline heart rate variability differ between children with vasovagal syncope and healthy children?
Absolute Event Rate: 60.46% vs 37.42%
p-value: p=0.003
Children and adolescents with vasovagal syncope exhibit significant baseline autonomic imbalances characterized by increased vagal tone and decreased sympathetic tone compared to healthy peers.
No takes yet. Share an insight, caveat, or question.
HRV differences may indicate autonomic imbalance in pediatric vasovagal syncope; leaves open clinical utility pending prospective validation.
Shim et al. (2014) conducted a case-control in Vasovagal syncope (n=43). Vasovagal syncope vs. Healthy controls was evaluated on Baseline SDNN (standard deviation of all average R-R intervals) (p=0.003). Children and adolescents with vasovagal syncope had significantly higher baseline SDNN (60.46 ms vs 37.42 ms) and RMSSD (57.90 ms vs 26.92 ms) compared to healthy controls, indicating increased vagal tone.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: